How to make a folded bath towel
Thanks for the help I figured it out by:

Creating the outline by bezier spline

Created the with by using the depth setting in the curve meny

Converting it to a mesh and moved half of the geometry to create the with of the towel

Removed the edges on the other side

Used the solidify modifier to create the with of the towel on the other side

Fine tuned the geometry so the fold isn't resting in mid air

Used hair particles for the strands